Bright’s CO2 Liquefaction Systems

In addition to the production of biomethane, the Bright Renewables CO2 liquefaction systems may be used to recover and liquefy COto create an extra source of revenue for the owner of the biogas plant with biogas upgrading system. Zero methane slip is achieved since the small amount of methane still present in the CO2 is recovered during the liquefaction process. When no liquid CO2 production is required, the recovery system can be put in a stand-by mode that requires no additional energy. The CO2 liquefaction technology of Bright is an in-house technology to convert biomass into liquid CO2 and tested in our own facility.


Clean substitute for CO2 from natural gas (by-product of fertiliser plants)

Increased independence of CO2 buyers / consumers

Create an extra source of revenue

Reducing carbon emissions

CO2 Liquefaction Plant

The CO2 liquefaction technology of Bright converts biomass into liquid CO2 and this is an in-house technology and tested in our own facility. The technology is unique by using clean circular cooling with CO2 as a refrigerant, instead of Freon or Ammonia. The technology is a containerized solution for plug & play installation on-site with a quick start-up. The purification and liquefaction of the CO2 enable an additional revenue stream by producing liquid (bio)CO2 for the horticulture-, food- and refrigeration industry.

In addition to the extra revenue, the CO2 liquefaction technology is an improvement of the carbon intensity score of the facility by reduction of CH4 loss (methane slip) in upgrading, thus one step closer to becoming a carbon neutral company. Besides reducing emissions, producing bio-CO2 at small scale production level resolves the issue of the lowering CO2 availability from the fertiliser industry, which is due to a higher natural gas price.

Extra source of revenue!

By extending the Bright Renewables system with a CO2 recovery module the gaseous CO2 that is produced
during the upgrading can be liquefied. This liquid CO2 has food grade quality and can be used in:


Refrigeration installations

Food and beverage industry



This is how we do it:

  • 1. Filter

    First, the CO2 goes to the activated carbon filter to remove impurities.

  • 3. Dryer

    The filtered gas passes  through an automatic molecular sieve dryer to completely remove the moisture.

  • 5. Stripping Column

    Any entrained non-condensables such as oxygen, methane and nitrogen are effectively removed in the stripping column.

  • 2. Compressor

    After the filter, the CO2 is compressed in a non lubricated two stage process compressor.

  • 4. Condenser

    The purified gas is sent to the CO2 liquefier; traces of non condensable gases still contained in the CO2 remain gaseous while the CO2 condenses in the liquefier.

  • 6. Pure Liquid CO2

    The pure liquid CO2 flows to an insulated storage tank.